CN105467878B - A kind of 10kV transformers of safety closing - Google Patents
A kind of 10kV transformers of safety closing Download PDFInfo
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- CN105467878B CN105467878B CN201510908099.XA CN201510908099A CN105467878B CN 105467878 B CN105467878 B CN 105467878B CN 201510908099 A CN201510908099 A CN 201510908099A CN 105467878 B CN105467878 B CN 105467878B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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Abstract
The present invention relates to a kind of 10kv transformers of safety closing, belong to transmission of electricity power supply unit field.Including 10kv step-down transformers, relay, electromagnetic lock, Insulation Resistance Tester and controller, Insulation Resistance Tester includes line end, ground terminal, signal end and shielding end, and the line end of Insulation Resistance Tester is connected by relay with the output terminal of 10kv step-down transformers, shields that end connect 10kv step-down transformers housing, ground terminal is grounded；Controller controls the keying of Insulation Resistance Tester, relay or solenoid valve and receives the detection signal of Insulation Resistance Tester；Electromagnetic lock is arranged on the switch of 10kv step-down transformer primary sides and for being locked or unlocked to the off-state of the switch；The controller includes MCU, display, keyboard and communicator；MCU is connected respectively with display, keyboard and communicator.
Description
Technical field
The present invention relates to a kind of 10kV transformers of safety closing, belong to transmission of electricity power supply unit field.
Background technology
10kV step-down transformers are by iron core（Or magnetic core）It being formed with coil, there are two coils or more than two windings,
In connect the winding of power supply primary coil, remaining winding is secondary coil.It can convert alternating voltage, electric current and impedance.
Iron core that simplest iron core 10kV step-down transformers are made by a soft magnetic materials and two numbers of turn being sleeved on iron core differ
Coil form.Insulation performance between insulation resistance expression each coil of 10kV step-down transformers, between each coil and iron core.Absolutely
The performance of the height of edge resistance and used insulating materials, temperature height and moist degree are related.
10kV transformers are when being powered, probably due to person works' error or other factors cause 10kV step-down transformers
Short circuit or its load patch 10kV step-down transformers short circuit, easily cause safety accident；Make especially for outdoor
10kV transformers, due to its supply line head, maintenance cycle is long, easily be powered when due to 10kV step-down transformers or its
The circuit isolation resistance of power supply is short to cause safety accident, influences power grid security.
Invention content
It is an object of the invention to：In view of the above problems, a kind of 10kV transformers of safety closing, this dress are provided
Put it is simple in structure, it is easy to use, there is stronger generalization, the 10kV step-down transformers for being applicable not only to new production come into operation,
Meanwhile suitable for the improvement and installation of existing 10kV transformers, enhance versatility and the safety of 10kV step-down transformers, compared with
The security risk of few 10kV power grids.The present apparatus is suitable for the 10kV step-down transformers of cell or open air, can effectively reduce
Because of the safety of 10kV step-down transformers insulating properties less harmful power grid itself and 10kV step-down transformers, while also it is avoided that and 10kV
The low safety for influencing equipment of insulating properties of its connected cable of step-down transformer, it is effective to ensure that 10kV step-down transformers are normal
Use.
The technical solution adopted by the present invention is as follows：
The invention discloses a kind of 10kV transformers of safety closing, including 10kV step-down transformers, relay, electromagnetism
Lock, Insulation Resistance Tester and controller；Insulation Resistance Tester includes line end, ground terminal, signal end and shielding end, insulation resistance
The line end of tester is connected by relay with the output terminal of 10kV step-down transformers, shielding end connection 10kV step-down transformer shells
Body, ground terminal ground connection；Controller controls the keying of Insulation Resistance Tester, relay or solenoid valve and receives Insulation Resistance Tester
Detection signal；Electromagnetic lock is arranged on the switch of 10kV step-down transformer primary sides, and for the off-state to the switch
It locks or unlocks；The controller includes MCU, display, keyboard and communicator；MCU respectively with display, keyboard and communicator
It is connected.
Further, the switch is high voltage isolator, and the high voltage isolator is in a manner that machinery opens and closes, the height
Disconnecting switch is pressed to include moving knife, stationary knife, knife rest, moving knife and stationary knife are connected on knife rest by insulation column, connected on moving knife respectively
Transmission shaft is connected to, which is used to control closing or opening for moving knife.
Further, the electromagnetic lock is fixed on knife rest, and the electromagnetic lock is by locking transmission shaft by high voltage isolator
Off-state lock or unlock.
Further, the controller is powered using 12V storage batterys, which is electrically connected by transformer and city；10kV drops
The output terminal connection having air switch of pressure transformer, the output terminal of air switch are connected with load.
Due to above structure, Insulation Resistance Tester is connected in the secondary side of 10kV step-down transformers, can be dropped in 10kV
Pressure transformer is detected the insulating properties of 10kV step-down transformers before being powered, and ensures 10kV step-down transformers in use
Safety, ensure safety when 10kV step-down transformers are powered, the effective peace for ensureing 10kV step-down transformers in power grid
Quan Xing；When the insulation resistance size of 10kV step-down transformers does not meet the regulation of energization, electromagnetic lock is controlled by its controller
Action, electromagnetic lock locking are set on the switch on front side of 10kV step-down transformers, make it that can not be closed, and can effectively ensure that 10kV drops
Pressure transformer is powered in the case of good insulating, especially suitable for outdoor 10kV inputs and the decompression 10kV decompressions of 220V outputs
Transformer, this application scenarios can ensure that equipment completes the detection of insulation resistance before energization, avoid becoming since 10kV is depressured
Depressor insulating properties is bad and causes the situation of grid short circuit, ensures the safety of equipment, lock of the disconnecting switch as electromagnetic lock
Determine mechanism, be since the distance of disconnecting switch distance decompression 10kV step-down transformers is minimum, can be less because of electromagnetism lock control
Circuit it is long caused by the defects of controlling progress, ensure the safety that its electromagnetic lock uses, can ensure that the normal of equipment makes
With the controller of the present apparatus can avoid influencing making for equipment because of the circuit power-off of remote power feeding using independent power supply
With property, the controller of the present apparatus uses the control of MCU, the unlock resistance value of electromagnetic lock can be set as needed, and the present apparatus is
When cell is powered, the safety in utilization of 10kV step-down transformers and its cell circuit is detected, cell fire is prevented, avoids because of cell
Complicated power grid environment and the safety used and influence 10kV power grids for influencing to be depressured 10kV step-down transformers.
Further, safety closing system includes：
Control unit, including MCU, display, keyboard and communicator；MCU respectively with display, keyboard and communicator phase
Even；
Power grid unit including 10kV power grids, high voltage isolator, breaker, 10kV step-down transformers, air switch and is born
It carries, 10kV power grids are connected by high voltage isolator and breaker with the primary side of 10kV step-down transformers, 10kV downconverters
The secondary side of device is connected by air switch with load；
Resistance detection unit, including relay, controller, Insulation Resistance Tester, Insulation Resistance Tester include line end,
Ground terminal, signal end and shielding end, the output terminal phase that the line end of Insulation Resistance Tester passes through relay and 10kV step-down transformers
Even, shielding end connection 10kV step-down transformer housings, ground terminal ground connection；Controller respectively with the control terminal of relay, insulation resistance
Tester signal end is connected, the keying of controller control Insulation Resistance Tester or relay, and receives Insulation Resistance Tester
Detection signal；
Electromagnetism lock unit, including electromagnetic lock, electromagnetic lock carries lock tongue, and electromagnetic lock is arranged on high voltage isolator, the height
Disconnecting switch is pressed in a manner that machinery opens and closes, which includes moving knife, stationary knife, knife rest, moving knife and stationary knife difference
It is connected on knife rest by insulation column, transmission shaft is connected on moving knife, which is used to control closing or opening for moving knife；
It is provided with through-hole or blind hole on transmission shaft, during high voltage isolator off-state, the through-hole or blind hole on transmission shaft are opposite；It should
The collapsing length of the lock tongue of electromagnetic lock is 4-6cm；
Load unit, including air switch and load, the secondary side phase of air switch input terminal and 10kV step-down transformers
Even, output terminal is connected with load；
Control unit is connect respectively with resistance detection unit and electromagnetism lock unit, and control unit judges that resistance detection unit is examined
Whether the insulating resistance value measured reaches the disconnection shape of setting value, the locking of control electromagnetism lock unit or unlock high voltage isolator
State.
Due to above system, by MCU control electromagnetism lock unit, resistance detection unit interoperation, to 10kV downconverters
Device output terminal carries out the detection of insulation resistance in load condition and light condition, when the detected value of insulation resistance does not meet setting
Regulation extremely, by the high voltage isolator of 10kV step-down transformer primary sides be locked as off-state effectively ensure be powered peace
Quan Xing when the 10kV step-down transformers for avoiding insulating properties not high access power grid, influences the safety of 10kV power grids, this system is more
The 10kV that is suitable for be depressurized to the decompression 10kV step-down transformers of 220v, especially for the decompression 10kV downconverters of cell power supply
Device, due to the complex circuit of cell power grid, the circuit in cell be easy to cause short circuit, in this case, advances in access power grid
The necessity of row Insulation monitoring has just highlighted the normal use that out, can ensure equipment, ensures the access of 10kV step-down transformers
Safety.
Further, the control method of safety closing system：
Step 1：The high voltage isolator and breaker for detecting the primary side of 10kV step-down transformers are off, and are examined
The air switch for surveying the secondary side of 10kV step-down transformers disconnects；
Step 2：MCU controls electromagnetism valve events and high voltage isolator is locked as off-state；
Step 3：MCU control relays are closed, while Insulation Resistance Tester is controlled to start, and detect 10kV step-down transformers
The insulation resistance of light condition；The insulation resistance numerical value that Insulation Resistance Tester detects is sent to MCU and by being connected with MCU
Display show；
Step 4：When the insulation resistance of 10kV step-down transformer light conditions is less than 900 megaohms, MCU passes through coupled
Communicator send alarm signal；When the insulation resistance of 10kV step-down transformer light conditions is not less than 900 megaohms, MCU is closed
Relay and Insulation Resistance Tester are closed, electric discharge 1-2s then is carried out to the secondary side of 10kV step-down transformers；
Step 5：The air switch of the secondary side of 10kV step-down transformers is closed, MCU control relays are closed, control simultaneously
Insulation Resistance Tester starts, and detects the insulation resistance of 10kV step-down transformer load conditions；
Step 6：When the insulation resistance of 10kV step-down transformer load conditions is less than 200 megaohms, MCU passes through coupled
Communicator send alarm signal；When the insulation resistance of 10kV step-down transformer load conditions is not less than 200 megaohms, MCU is closed
Relay and Insulation Resistance Tester are closed, then discharge to the secondary side of 10kV step-down transformers 1-1.5s；
Step 7：The insulation resistance of Insulation Resistance Tester detection 10kV step-down transformer load conditions is not less than 200,000,000
Europe, light condition insulation resistance be not less than 900 megaohms when, MCU control solenoid valve to high voltage isolator unlock, can
It is closed；
Step 8：The air switch of 10kV step-down transformer secondary sides is disconnected, is then closed 10kV step-down transformers one successively
Then high voltage isolator, the breaker of secondary side are closed the air switch of 10kV step-down transformer secondary sides, and are provided for load
Electricity consumption.
As a result of the above method, measure 10kV transformers its insulation resistance in the case of zero load and be more than 900 megaohms,
It avoids the insulating properties of 10kV step-down transformers in itself inadequate, and endangers the safety of 10kV power grids, after completion, detection 10kV becomes
Depressor is more than 200 megaohms, can ensure in load end with the insulation resistance in the case of load, the resistance value of insulation resistance
Insulating properties on cable improves the safe handling of equipment, in addition, the present apparatus also is able to pacify existing 10kV transformers
Dress, is conducive to the popularization of the present apparatus.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, the present apparatus is simple in structure, easy to use, has stronger generalization, is applicable not only to the 10kV decompressions of new production
Transformer comes into operation, meanwhile, suitable for the improvement and installation of existing 10kV transformers, enhance the general of 10kV step-down transformers
Property and safety, the security risk of less 10kV power grids.
2nd, the present apparatus is suitable for the 10kV step-down transformers of cell or open air, can effectively reduce and become because 10kV is depressured
The safety of depressor insulating properties less harmful power grid itself and 10kV step-down transformers, at the same be also avoided that with 10kV step-down transformers its
The low safety for influencing equipment of insulating properties of connected cable, it is effective to ensure that 10kV step-down transformers normally use.
3rd, the present apparatus carries out Insulation monitoring between each be powered, and avoids cable or 10kV downconverters after repair
Device situation short-circuit after being powered, avoids the safe handling of equipment.
Description of the drawings
Fig. 1 is the safety closing system construction drawing that 10kV step-down transformers are used in the present invention；
It is marked in figure：1-10kV power grids, 2- breakers, 3- high voltage isolators, 4- electromagnetic locks, 5-10kV downconverters
Device, 6- controllers, 7- relays, 8- Insulation Resistance Testers, 9- air switches, 10- loads.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Specific embodiment 1：
As shown in Figure 1, a kind of 10kV transformers of safety closing of the present invention, including 10kV step-down transformers 5, relay
7th, electromagnetic lock 4, Insulation Resistance Tester 8 and controller 6, Insulation Resistance Tester 8 include line end, ground terminal, signal end and shielding
End, the line end of Insulation Resistance Tester 8 are connected by relay 7 with the output terminal of 10kV step-down transformers 5, the connection of shielding end
5 housing of 10kV step-down transformers, ground terminal ground connection；Controller 6 controls opening for Insulation Resistance Tester 8, relay 7 or solenoid valve
It closes, and receives the detection signal of Insulation Resistance Tester 8；Electromagnetic lock 4 is arranged on the switch of 5 primary side of 10kV step-down transformers
On, and for being locked or unlocked to the off-state of the switch.It switchs as high voltage isolator 3, which uses
The mode that machinery opens and closes, the high voltage isolator 3 include moving knife, stationary knife, knife rest, and moving knife and stationary knife are connected respectively by insulation column
It is connected on knife rest, transmission shaft is connected on moving knife, which is used to control closing or opening for moving knife.Electromagnetic lock 4 is fixed on
On knife rest, which is locked or unlocked the off-state of high voltage isolator 3 by locking transmission shaft.Controller 6 uses
12V storage batterys are powered, which is electrically connected by another transformer with city.The output terminal of 10kV step-down transformers 5 is connected with air
Switch 9, the output terminal of air switch 9 are connected with load 10.10kV step-down transformers 5 once pass through high voltage isolator 3, open circuit
Device 2, high voltage isolator 3 are connected to 10kV power grids 1.Controller 6 includes MCU, display, keyboard and communicator；MCU respectively with
Display, keyboard and communicator are connected.
Due to above structure, Insulation Resistance Tester 8 is connected in the secondary side of 10kV step-down transformers 5, it can be in 10kV
Step-down transformer is detected the insulating properties of 10kV step-down transformers before being powered, and ensures that 10kV step-down transformers are using process
In safety, ensure safety when 10kV step-down transformers are powered, it is effective to ensure that 10kV step-down transformers are said in power grid 1
Safety；When the insulation resistance size of 10kV step-down transformers does not meet the regulation of energization, electricity is controlled by its controller 6
Magnetic padlock 4 acts, and the locking of electromagnetic lock 4 is set on the switch on front side of 10kV step-down transformers, makes it that can not be closed, can effectively ensure that
10kV step-down transformers are powered in the case of good insulating, especially suitable for outdoor 10kV inputs and the decompression of 220v outputs
10kV step-down transformers, this application scenarios can ensure that equipment completes the detection of insulation resistance before energization, avoid due to
10kV step-down transformer insulating properties is bad and causes the situation of 1 short circuit of power grid, ensures the safety of equipment, disconnecting switch 3 is made
For the locking mechanism of electromagnetic lock 4, be since distance of the disconnecting switch 3 apart from decompression 10kV step-down transformers is minimum, can be less
Because 4 control circuit of electromagnetic lock it is long caused by control progress the defects of, ensure the safety used of its electromagnetic lock 4,
It can ensure the normal use of equipment, the controller 6 of the present apparatus uses independent power supply, can avoid the line because of remote power feeding
Road powers off and influences the usability of equipment, and electromagnetic lock 4 can be set as needed using the control of MCU in the controller 6 of the present apparatus
Unlock resistance value, when the present apparatus is powered for cell, detect the safety in utilization of 10kV step-down transformers and its cell circuit, prevent
Only cell fire avoids influencing being depressured using and influencing 10kV for 10kV step-down transformers due to 1 environment of power grid of cell complexity
The safety of power grid 1.
Specific embodiment 2：
According to the 10kV transformers of safety closing described in embodiment 1, control method：
Step 1：It detects the high voltage isolator 3 of the primary side of 10kV step-down transformers 5 and breaker 2 is in and disconnects shape
State, the air switch 9 of the secondary side of detection 10kV step-down transformers 5 disconnect；
Step 2：MCU controls electromagnetism valve events and high voltage isolator 3 is locked as off-state；
Step 3：MCU control relays 7 are closed, while Insulation Resistance Tester 8 is controlled to start, and detect 10kV downconverters
The insulation resistance of 5 light condition of device；The insulation resistance numerical value that Insulation Resistance Tester 8 detects be sent to MCU and by with MCU
Connected display is shown；
Step 4：When 5 light condition of 10kV step-down transformers insulation resistance be less than 900 megaohms when, MCU by with its phase
Communicator even sends alarm signal；When the insulation resistance of 5 light condition of 10kV step-down transformers is not less than 900 megaohms, MCU
Relay 7 and Insulation Resistance Tester 8 are closed, electric discharge 1-2s then is carried out to the secondary side of 10kV step-down transformers 5；
Step 5：The air switch 9 of the secondary side of 10kV step-down transformers 5 is closed, MCU control relays 7 are closed, simultaneously
Control Insulation Resistance Tester 8 starts, and detection 10kV step-down transformers 5 load the insulation resistance of 10 states；
Step 6：When 10kV step-down transformers 5 load 10 states insulation resistance be less than 200 megaohms when, MCU by with its
Connected communicator sends alarm signal；When the insulation resistance that 10kV step-down transformers 5 load 10 states is not less than 200 megaohms
When, MCU closes relay 7 and Insulation Resistance Tester 8, and then discharge to the secondary side of 10kV step-down transformers 5 1-1.5s；
Step 7：Insulation Resistance Tester 8 detects 10kV step-down transformers 5 and loads the insulation resistance of 10 states not less than 200
Megaohm, the insulation resistance of light condition is when being not less than 900 megaohms, MCU control solenoid valves unlock high voltage isolator 3, make it
It can be closed；
Step 8：The air switch 9 of 5 secondary side of 10kV step-down transformers is disconnected, is then closed 10kV step-down transformers successively
High voltage isolator 3, the breaker 2 of 5 primary sides, are then closed the air switch 9 of 5 secondary side of 10kV step-down transformers, and are
Load 10 provides electricity consumption.
As a result of the above method, measure 10kV transformers its insulation resistance in the case of zero load and be more than 900 megaohms,
The insulating properties for avoiding 10kV step-down transformers 5 itself is inadequate, and endangers the safety of 10kV power grids 1, after completion, detects 10kV
Transformer is more than 200 megaohms, can ensure loading with the insulation resistance in the case of load 10, the resistance value of insulation resistance
Insulating properties on the cable at 10 ends improves the safe handling of equipment, in addition, the present apparatus also is able to existing 10kV transformers
It is installed, is conducive to the popularization of the present apparatus.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of 10kV transformers of safety closing, which is characterized in that including 10kV step-down transformers, relay, electromagnetic lock, absolutely
Edge resistance meter and controller；Insulation Resistance Tester includes line end, ground terminal, signal end and shielding end, megger test
The line end of instrument is connected by relay with the output terminal of 10kV step-down transformers, shielding end connection 10kV step-down transformer housings,
Ground terminal is grounded；The keying of controller control Insulation Resistance Tester, relay or solenoid valve, and receive Insulation Resistance Tester
Detect signal；Electromagnetic lock is arranged on the switch of 10kV step-down transformer primary sides, and for being locked to the off-state of the switch
Fixed or unlock；The controller includes MCU, display, keyboard and communicator；MCU respectively with display, keyboard and communicator phase
Even；Further include control method：
Step 1：The high voltage isolator and breaker for detecting the primary side of 10kV step-down transformers are off, and are detected
The air switch of the secondary side of 10kV step-down transformers disconnects；
Step 2：MCU controls electromagnetism valve events and high voltage isolator is locked as off-state；
Step 3：MCU control relays are closed, while Insulation Resistance Tester is controlled to start, and detection 10kV step-down transformers are unloaded
The insulation resistance of state；The insulation resistance numerical value that Insulation Resistance Tester detects is sent to MCU and is shown by what is be connected with MCU
Show that device is shown；
Step 4：When the insulation resistance of 10kV step-down transformer light conditions is less than 900 megaohms, MCU is led to by coupled
It interrogates device and sends alarm signal；When 10kV step-down transformer light conditions insulation resistance be not less than 900 megaohms when, MCU close after
Then electric appliance and Insulation Resistance Tester carry out electric discharge 1-2s to the secondary side of 10kV step-down transformers；
Step 5：The air switch of the secondary side of 10kV step-down transformers is closed, MCU control relays are closed, while control insulation
Resistance meter starts, and detects the insulation resistance of 10kV step-down transformer load conditions；
Step 6：When the insulation resistance of 10kV step-down transformer load conditions is less than 200 megaohms, MCU is led to by coupled
It interrogates device and sends alarm signal；When 10kV step-down transformer load conditions insulation resistance be not less than 200 megaohms when, MCU close after
Electric appliance and Insulation Resistance Tester, then discharge to the secondary side of 10kV step-down transformers 1-1.5s；
Step 7：The insulation resistance of Insulation Resistance Tester detection 10kV step-down transformer load conditions is not less than 200 megaohms, sky
When the insulation resistance of load state is not less than 900 megaohms, MCU controls solenoid valve to unlock high voltage isolator, can be closed；
Step 8：The air switch of 10kV step-down transformer secondary sides is disconnected, is then closed 10kV step-down transformer primary sides successively
High voltage isolator, breaker, then be closed 10kV step-down transformer secondary sides air switch, and for load use is provided
Electricity.
2. the 10kV transformers of safety closing according to claim 1, which is characterized in that the switch is opened for high_voltage isolation
Close, the high voltage isolator using machinery open and close by the way of, the high voltage isolator include moving knife, stationary knife, knife rest, moving knife and determine
Knife is connected to by insulation column on knife rest respectively, and transmission shaft is connected on moving knife, which is used to control the closure of moving knife
Or it opens.
3. the 10kV transformers of safety closing according to claim 2, which is characterized in that the electromagnetic lock is fixed on knife rest
On, which is locked or unlocked the off-state of high voltage isolator by locking transmission shaft.
4. the 10kV transformers of safety closing according to claim 1, which is characterized in that the controller is using 12V electricity
Bottle power supply, the storage battery are electrically connected with city；The output terminal connection having air switch of 10kV step-down transformers, the output terminal of air switch
It is connected with load.
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| CN203204085U (en) * | 2013-02-27 | 2013-09-18 | 山东电力集团公司物资供应公司 | A comprehensive testing system used for casually inspecting the quality of a distribution transformer |
| CN103941100A (en) * | 2014-02-28 | 2014-07-23 | 国家电网公司 | Intelligent device for measuring dielectric loss factor and insulation resistance of power transformer |
| CN205229721U (en) * | 2015-12-10 | 2016-05-11 | 成都德善能科技有限公司 | Safe 10kV transformer that closes a floodgate |
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|---|---|
| CN105467878A (en) | 2016-04-06 |
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